MXC is a sandboxed code execution system designed for running untrusted code, such as AI model output, plugins, and tools, on Windows, Linux, and macOS.
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It provides a policy-driven containment layer that allows developers to define strict resource access rules for workloads, which are then enforced by platform-native backends.
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Policy-driven sandboxing for filesystem, network, and UI access
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Cross-platform support using native backends like ProcessContainer, Bubblewrap, Seatbelt, and MicroVMs
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Unified JSON-based configuration schema and stable V1 SDKs for Rust,.NET, and Node.js
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Lifecycle management for both one-shot execution and persistent containers
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Diagnostic tools including audit and learning modes to refine least-privilege security policies
Open Source
MXC is free and open-source under the MIT license.
Best for
Developers building AI agents, coding assistants, or plugin hosts who need to embed secure, policy-controlled code execution into their applications.
Not ideal for
Users looking for a standalone agent sandbox CLI tool or a hosted sandbox service, as MXC is an SDK intended for integration directly into custom applications.
A robust, cross-platform containment foundation from Microsoft that is highly effective for developers needing to securely execute model-generated code within their own tools, though some advanced Windows backends remain experimental.
Microsoft announced the general availability (GA) of MXC on October 7, 2026, alongside the release of the stable v1 SDKs. Recent updates also include support for Windows 11 24H2/25H2 capabilities and new directional networking policies in the 0.9 and 1.0 schema versions.
As of
Is Microsoft Execution Containers (MXC) free?+
Yes - Microsoft Execution Containers (MXC) is Open Source. MXC is free and open-source under the MIT license.
Is Microsoft Execution Containers (MXC) open source?+
Yes - Microsoft Execution Containers (MXC) is open source. MXC is free and open-source under the MIT license.
Who is Microsoft Execution Containers (MXC) best for?+
Developers building AI agents, coding assistants, or plugin hosts who need to embed secure, policy-controlled code execution into their applications.
Who is Microsoft Execution Containers (MXC) not ideal for?+
Users looking for a standalone agent sandbox CLI tool or a hosted sandbox service, as MXC is an SDK intended for integration directly into custom applications.
What are the best Microsoft Execution Containers (MXC) alternatives?+
The closest Microsoft Execution Containers (MXC) alternatives on ai.dosa.dev are Pieces for Developers, agenttrace, Vibe Kanban - all listed under Developer Productivity & Workflow.
Who makes Microsoft Execution Containers (MXC)?+
Microsoft Execution Containers (MXC) is developed by Microsoft. It is listed in the Developer Productivity & Workflow category on ai.dosa.dev.
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